They sort of do with the super chargers already. If someone has a car that’s deemed to damaged its disconnected

Because commonly they use radar instead, the modern sensors that are also used for adaptive cruise control even have heaters to defrost the sensor housing in winter

Relative to the car, it’s peanuts at large quantities

Everyone and their dog uses radar for distance sensing for the adaptive cruise control. You take the same migh speed sensor and use it for wall detection. It’s how the emergency stop functions work where it detects a car in front of you slamming on the brakes.

Not really, just make the vehicle 800v and then use the same Amp limits. That’s where everyone is out pacing tesla now. Tesla went for amps, the others went for volts